Premium 3-in-1 True HEPA filter replacement with Activated Carbon for Proton Pure air purifier Compatible with original Proton Pure air filter 3 Stages Filtration: Preliminary filter prevents any large particles such as hair, debris, pet fur etc getting side the air purifier. It helps extend the filter life span. High quality HEPA filter capture 99.97% of airborne particles down to 0.3 microns. Activated Carbon captures household unfavorable Odors & harmful VOCs. 3 filters included. Suggest replacing the filter every 6 months the most to optimize the performance. Size 5.63" x 5.63" x 5.39". Quality meets or exceeds the leading national brand
